Mixer for gaseous fuel.



F. E. BACHMAN.

MIXER POR GASBOUS FUEL.

AEBLIGATION NLBD 00T.e.1911.

1,061,655. Patented May13,1913.

ZH-wily. AZ.

INVENTOFI WITNESSES UNITED STATES PATENT OFFICE.

FRANK E. BACHMAN, 0F PORT HENRY, NEW YORK.

,MIXER FOR GASEOUS FUEL.

Specification of Letters Patent.

Patented May 13,1913.

Application tiled October 9, 1911. Serial No. 653,688.

To all whom t may concern.'

Be it known that I, FRANK E. BACHMAN a resident of Port Henry, in the county o Essex, State of New York, have invented a new and useful Improvement in Mixersfor Gaseous Fuel, of which the following is a full, clear, and exact description, reference being had to the accompanyingdrawings, forming part of this specification, in which- Figure l is an elevation of a gas engine showing niy invention applied thereto, the pipe leading from the carbureter to the en gine being partly broken away; Fig: 2 is a sectional view of the device embodying my invention; Fig. 3 is a bottom plan view of the saine; and Fig. 4 is a side elevation of another form of screen.

My invention has relation to improvements in mixers for gaseous fuel, and is designed to provide a simple and efficient device capable of being placed in the intake pipe of an engine between the carbui'eter and the intake valves, for the purpose of producing more perfect vaporization of the liquid, such as gasolene, alcohol and the like allied substances used for fuel and carburation of the air mixed with them. The more nearly the fuel approaches its molecular size, the'more closely will each particle be associated with the oxygen necessary for its combustion and the more rapid and complete Will be its combustion when ignited. Rapid combustion is necessary for the development of the maximum initial pressure in an internal combustion engine; and high initial pressures and perfect combustion together produce the highest engine efficiency. Complete combustion also prevents fouling of the engine cylinders with carbon deposits.

My invention is designed to. produce a more perfect vaporization of the fuel emv ployed and its admixture with the air, thereby minimizing and very largely obviating the formation of carbon deposits in the enine which result in preignition, back-firing, eaky outlet valves, etc., and the power losses resulting therefrom; also to provide for a more even power development in the several cylinders of a multi-cylinder engine. A

One feature of my invention consists in the employment of fixed baffle plates placed in the intake pipe of an internal combustion engine, between the carbureter and the intake valve, and which are arranged to change the direction of the gas flow, whereby the globules of liquid fuel are broken up pletely vaporized.

by the cross currents produced. I have further found that the best form of fixed baffle for such use is one which will give the gas a swirling motion. I have also found that when liquid fuel, such as alcohol or gasolene, fiows on to a screen or wire gauze! having small openings, its surface tension causes it to spread across the openings in an extremely thin film, similar to the walls of a soap bubble; and further, when gas or air passes through the openings 0f a screen so covered with the fuel film, the fuel is com- I have further found that the efficiency of the gauze or screen is very greatly increased by causing the liquid fuel to flow on to the screenat any angle other than a right angle to its direction of fiow, and that the particles of fuel and the carbureted air which strikes the screen should have a swirling motion. To be effective, the screen openings should be small enough to allow the formation of a film by surface tension, and they should be of suffi-- cient number to allow the free passage of the gas. A dome-shaped or conical screen placed with its base toward the caibuieter apparently best fulfils the conditions, but other forms may be provided which will give satisfactory results. y

In the accompanying drawings, the "numeral 2 designates an inteinal combustion engine of the multi-cylinder type and 3 the carbureter. A

4 designates the intake pipe leading from the carbureter. 5 designates the baffle which is placed in said pipe and which has a plu rality of oblique fixed varies or wings 6. The franie 7 of the baffle is shown as constituting a support for the wire gauze screen 8, having its base toward the carbureter. The wings or blades 6 act to change the direction of the gas flow, the cross currents produced breaking up the liquid fuel and the gas being given a swirling motion. The screen acts in the manner above described.

While the device is conveniently formed,

as shown, by making the baille or deflectortially as described.

baiies actingv to change the direction of the air currents passing through theintakeplpe andcausing cross-currentsb which tend to break up drops of liquid fuel and-to 'impart a 'swirling motion to the mixture of air andfuel within the body of the. screen; substan- 2. A device for use in' intake pipes of internal combustion engines, comprising a supporting' member having therein a series of fixed oblique vanes or baliies, and an elongated hollow screen closed at one end and. having its open end secured to the supporting member, said screen having at least a portion of its surface at an angle to the 1ongitudinal axis of the intake pipe; substanytially as described.'v l l 3. A device for use 1n the intake pipe of internal combustion enginesfsaid device bevinglocated between-the carbureter and the engine and acting upon the explosive mixture passing yto the engine, and comprising a fixed screen surface at an oblique angle to the normal direction of travel of the mixture, and a plurality of fixed oblique baiie members arranged to act upon the mixture adjacent to the ,screen and to impart a swirling motion to the mixture, substantially as described. l

In testimony whereof, I have hereuntoset my hand.

l FRAN-KE. BACHMAN. W/itnesses:

JNO. J. RING,

' E. T. STORES. 

